fire warning light test button是什么意思

用法例句

The series standards of environmentally conscious design guide for low-voltage apparatus,including general rule,knife disconnector,circuit-breaker,contactor,fuse,button lamp and terminal were presented.

介绍了低压电器环境意识设计导则系列标准,包括总则、刀形隔离器、断路器、接触器、熔断器、按钮信号灯、接线端子;给出了将环境因素引入低压电器产品设计和开发的总体考虑,并规定了上述产品的特定要求。